util: Add _sentinel_ to strextend()

Since it must be NULL terminated.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/shared/util.h b/src/shared/util.h
index 5d1b0b1c31..eee66ccf64 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -633,7 +633,7 @@ static inline void *mempset(void *s, int c, size_t n) {
 char *hexmem(const void *p, size_t l);
 void *unhexmem(const char *p, size_t l);
 
-char *strextend(char **x, ...);
+char *strextend(char **x, ...) _sentinel_;
 char *strrep(const char *s, unsigned n);
 
 void* greedy_realloc(void **p, size_t *allocated, size_t need);